Thermostatic control.



I i QM.

G. R. FASSETT.

THERMOSTATIC CONTROL.

APPLICATION FILED MAR. 21. 1913.

Patented Oct. 5, 1915.

GEORGE R. FASSETT.

0F LAKEWOOD. OHIO.

THERMOSTATIC CONTROL.

Specification of Letters Patent.

PatentcdOct. 5. 1915.

Application filed March 21. 1913. Serial No. 755,892.

I! '0 (1H whom it may concern Be it known that l. ('ilcoaor: It. Fassn'ul, a citizen of the United States. and resident of Lakewood. in the county of uyahoga and State of Ohio. have invented certain new and useful Improvements in 'lhermostatic Control, of which I hereby declare the following to be a full. clear. and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

The objects of the invention are to provide means for automatically controlling the temperature ina room or hall such as an otlice building. court house. or dwelling. and the primary objects of the invention are to provide automatically acting mechanism which will alternately connect and disconnect the terminals of a circuit for electrically controlling the operation of a motor. which controls the dampers of afurnace and thereby by repeated impulses to set the drafts for increasing or diminishing the amount of heat as desired and for predetermined periods of time. For instance. if it is desired to diminish the amount of heat obtained from the furnace during the night and to provide a predetermined increased amount during the day time, the device will operate the motor to reduce the draft at night and increase the draft in the day time, and the changes will take place at predetermined-hours, or a change of temperature can be ar 'anged for at any predetermined hour. Further, the device is designed to retain the temperature constant until a predetermined hour at which time it may become either hotter or colder as desired.

The invention is operated by clock work to control the hour of change and it can be attached to or operated in connection with any thermostat possessing a metallic member expanding by means of heat units.

The invention further consists in the combination and arrangement of parts and construction of details hereinafter described. shown in the accompanying drawings and specifically pointedout in the claims.

In the'accompanying drawings Figure 1 is a front elevation of the device and Fig. .2 is a side elevation thereof. Fig. 3 isa per spective View of the vibratable plate which operates the contact making lever.

In these views A is a frame upon which the coiled metal blade B is mounted. C, C are adjustable contact points in the gap between which the blade extcnds and with which the end of the blade alternately makes contact as the units of heat affect the expansion and contraction of the coil. The contact points are in an electric circuit which controls a motor for operating the dampers of a furnace. and the blade serves as a conductor in each instance when it makes contact with said points in turn.

D is a binding post with which the blade is electrically connected and E, E, E are the circuit wires. I

F is a vibrating arm or lever pivoted at F in the frame and upon this arm the contact points are mounted so that by the vibration of the arm the blade B can touch the points alternately. The lower end of the. lever is turned up at f to form an indicator finger which moves over a scale of temperature having preferably as the normal condition. varying on one side to hot and the other to cold.

Mounted upon the frame is a clock (i upon the hour spindle of which is secured the spur gear I which engages a spur gear J mounted on the frame and having twice as many teeth as the gear I. and which is divided. into 24 parts. thus giving divisions for both day and night. In the face of the gear J are shown two rows of holes K. K. in which pins L and L can be inserted at pleasure. one L in one row to control the change from night to morning and the other L to control the change from day to night on the following day. The movement of the lever F is controlled by means of this wheel in the following manner: Pivotcd upon a bracket M over the gear and directly between the rows of openings K and K is a balanced vibratable plate N which is opera tively connected with the lever F by means of the cranked arm N and links N N. The plate N is wedge shaped so that one edge n will be engaged and forced down by the pin L in the inner rim of holes in the gear. and the other edge n will be engaged and forced up by the pin L in the outer row of holesin the gear, thus alternately moving the lever to right and left so that. the contact points moving with the lever will alternately make and break electric contact with the expanding blade of the thermostat.

The amount of movement required of the contact points is very slight so that they can be set as close as desired to the pivot point thereof. The pins can be-set in holes loo llll

corresponding with any of the hours desired and will operate the lever successfully at any predetermined hours.

Having described the invention what I claim as new and desire to secure by Letters Patent is:

1. The combination with a thermostat blade free to move at one end and a pivoted lever provided with a contact point for an electric circuit on each side of said thermostat blade, of clock actuated gearing, one gear therein provided with concentric circles, each circle having openings for each. of the '24 hours, pins insertible in the openings in said circles, and mechanismactuated by said pins in turn to move said pivoted lever to bring said contact points alternately into engagement with said thermostat blade, said blade serving also as one terminal of said electric circuit. 7

2. In a clock controlled device for closing an electric circuit at predetermined periods. a thermostat blade a pivoted lever provided with contact points in said electric circuit, one point in each side of said lever, a gear actuated by the hour spindle of said clock, a larger gear actuated thereby and spaced into 24 divisions, said larger gear provided with openings arranged in concentric circles, and having 24 openings in each circle, pins insertible in said circles in the positions of predetermined hours for day and night and a pivoted member intermediate between saidconcentric circles and actuated in turn said pivoted lever and said pivoted member reversely operated by the pins in the respective circles to move said levers in opposite directions.

3. In a clock controlled mechanism for closing an electric circuit at predetermined intervals, in combination, a thermostat blade forming one terminal of said circuit, a pivoted blade provided with contact points arranged one on each side of said blade and forming each in turn the other terminal of said circuit, according as said blade contacts with them in turn, a gear operated by the clock spindle to turn once in 1'2 hours, a second gear operated by said first gear to turn once in 24 hours, said second gear provided with openings arranged in concentric circles therein, one representing the hours of day and the others representing the hours of night, a pin insertible in said openings in each circle, a pivoted member intermediate between said concentric circles of openings, said member. adapted to be actuated in opposite directions by the pins in said circlcs, and links connecting said lever operatively with said pivoted member, whereby said lever will move to alternately engage said contact points with said thermostat blade at predetermined hours of day and night.

In testimony whereof, I hereunto set my hand this 11th day of February 1913.

GEORGE R. FASSETT.

In presence of VVM. M. MoNnoE, R. J. W. KLINE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

